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2.2.3a Melting, boiling, condensation and solidification

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Question 62

During the process of evaporation, some molecules escape from the surface of a liquid, causing its temperature to change.

Which row correctly describes the average kinetic energy of the escaping molecules compared to the average of the liquid, and the resulting effect on the temperature of the remaining liquid?

Average kinetic energy of escaping moleculesTemperature of the remaining liquid
ALower than averageIncreases
BLower than averageDecreases
CHigher than averageDecreases
DHigher than averageIncreases
A

Row A

B

Row B

C

Row C

D

Row D

Markscheme

2.2.3a Melting, boiling, condensation and solidification Questions

  1. IGCSE
  2. /Physics
  3. /2.2.3a Melting, boiling, condensation and solidification

313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.

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